//使用指针和函数
#include "stdio.h"

void  test(int *int_pointer) {
  *int_pointer = 100;
}

int main(int argc, char const *argv[]) {
  void  test(int *int_pointer);

  int i = 50, *p = &i;

  printf("Before the call to test i = %i\n", i);

  test(p);
  printf("After the call to test i = %i\n", i);
  return 0;
}
